[ADD] Check for installed system package

Author: ppfeufer

.make/conf.d/django-esi.mk

@@ -2,17 +2,28 @@
 
 .PHONY: get-compatibility-dates
 get-compatibility-dates:
+	@if ! command -v jq >/dev/null 2>&1; \
+		then \
+			echo ""; \
+			echo "$(TEXT_COLOR_RED)$(TEXT_BOLD)ERROR:$(TEXT_RESET) jq is required but not installed. Please install jq first."; \
+			echo ""; \
+			exit 1; \
+	fi;
 	@echo "Fetching compatibility dates for ESI API..."; \
 	response=$$(curl -s "https://esi.evetech.net/meta/compatibility-dates"); \
 	if [ $$? -ne 0 ]; \
 		then \
-			echo "Error: Failed to fetch compatibility dates"; \
+			echo ""; \
+			echo "$(TEXT_COLOR_RED)$(TEXT_BOLD)ERROR:$(TEXT_RESET) Failed to fetch compatibility dates"; \
+			echo ""; \
 			exit 1; \
 	fi; \
 	dates=$$(echo "$$response" | jq -r '.compatibility_dates[]' | sort -r); \
 	if [ -z "$$dates" ]; \
 		then \
-			echo "Error: No dates found or invalid response"; \
+			echo ""; \
+			echo "$(TEXT_COLOR_RED)$(TEXT_BOLD)ERROR:$(TEXT_RESET) No dates found or invalid response"; \
+			echo ""; \
 			exit 1; \
 	fi; \
 	echo ""; \